package com.project.shiro;

import com.project.bean.UserBean;
import com.project.service.IUserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.util.ByteSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class CustomRealm extends AuthorizingRealm {
    @Autowired
    private IUserService userService;

    public CustomRealm() {
        HashedCredentialsMatcher matcher = new HashedCredentialsMatcher();
        //设置加密算法
        matcher.setHashAlgorithmName("md5");
        //设置散列次数
        matcher.setHashIterations(1024);
        //设置编码为hex编码
        matcher.setStoredCredentialsHexEncoded(true);
        //设置凭证管理器
        this.setCredentialsMatcher(matcher);
    }

    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        //得到登录用户
        UserBean user = (UserBean) principalCollection.getPrimaryPrincipal();
        System.err.println(user);
        //创建授权对象
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        user.getRoleList().forEach(n -> {
            //添加角色
            info.addRole(n.getName());
        });
        user.getPermissionList().forEach(n -> {
            info.addStringPermission(n.getContent());
        });
        return info;
    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        //得到用户名
        String userName = authenticationToken.getPrincipal().toString();
        //按照按照用户名查找用户
        UserBean user = userService.findByName(userName);
        //判断用户是否在职
        if (user != null && "在职".equals(user.getStatus())) {
            return new SimpleAuthenticationInfo(user,
                    user.getPwd(),
                    ByteSource.Util.bytes(user.getSalt().getBytes()),
                    this.getName());
        }
        return null;
    }
}
